EP 0056514 A2 19820728 - Hydraulic control system.
Title (en)
Hydraulic control system.
Title (de)
Hydraulische Steueranordnung.
Title (fr)
Système hydraulique de commande.
Publication
Application
Priority
US 22581581 A 19810116
Abstract (en)
An hydraulic control system is disclosed which comprises a fluid reservoir (14), a variable displacement pump (12) having a fluid input connected to the reservoir and a fluid output, and a fluid pressure actuated displacement of the pump. A control valve (18) is connected to the fluid output of the variable displacement pump and to the reservoir and is adapted to control the flow of fluid to a fluid actuated device. The control valve includes means (44, 50, 52, 54, 56) for regulating flow of a signal fluid provided either by a constant displacement pump (46) or a pressure actuated flow control valve (47). A sensor valve (58) is placed in fluid communication with the signal fluid, the displacement control mechanism, and the reservoir for placing the signal fluid in communication with the displacement control mechanism or for placing the displacement control mechanism in communication with the reservoir, in response to changes in the pressure of the signal fluid, thereby controlling the displacement of the pump in response to the magnitude of the pressure of the signal fluid.
IPC 1-7
IPC 8 full level
F15B 11/00 (2006.01); F04B 49/00 (2006.01); F15B 11/02 (2006.01)
CPC (source: EP KR US)
F04B 49/002 (2013.01 - EP US); F15B 11/02 (2013.01 - EP KR US); G05B 11/00 (2013.01 - KR); F15B 2211/20553 (2013.01 - EP US); F15B 2211/25 (2013.01 - EP US); F15B 2211/30505 (2013.01 - EP US); F15B 2211/30525 (2013.01 - EP US); F15B 2211/3111 (2013.01 - EP US); F15B 2211/3144 (2013.01 - EP US); F15B 2211/31576 (2013.01 - EP US); F15B 2211/50518 (2013.01 - EP US); F15B 2211/5151 (2013.01 - EP US); F15B 2211/6355 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
EP 0056514 A2 19820728; EP 0056514 A3 19820804; BR 8108545 A 19821019; CA 1174561 A 19840918; JP S57137701 A 19820825; KR 830008060 A 19831109; PL 234723 A1 19821122; US 4408453 A 19831011
DOCDB simple family (application)
EP 81304997 A 19811023; BR 8108545 A 19811230; CA 386300 A 19810921; JP 234182 A 19820112; KR 810005203 A 19811229; PL 23472382 A 19820115; US 22581581 A 19810116